Flint 40B-A2.5B
Flint 40B-A2.5B loads in 22.9 GB at NVFP4 and decodes at the speed of its 2.5B active path, comfortably from 36 GB of memory, Macs included, starting at the MacBook Pro M5 Pro 48GB. Below is the memory math we ran for it, the smallest card that fits, and the fastest machine we track.
- Parameters
- 39.8B(2.5B active)
- Format
- NVFP4
- Min memory
- 36 GB
- Best for
- Agentic coding, Long context
How much memory does Flint 40B-A2.5B need?
Flint 40B-A2.5B is a 39.8B mixture-of-experts model (2.5B active per token) built for agentic coding, long context. The weights alone take 22.9 GB at NVFP4; add context and the OS, and it belongs in the 36 GB memory class. Every number below comes from the ModelFit engine: speeds are estimates, labeled est., because we do not benchmark hardware ourselves.
KV = fp16 estimate (q8_0 cache roughly halves it). "Comfortable" = weights + KV within the engine's tiered budget (~70-85% of memory).
Which machines run Flint 40B-A2.5B?
- Smallest GPU
- NVIDIA GeForce RTX 5090est. 363 tok/s · 32 GB VRAMtypical error 15%
- Fastest
- NVIDIA GeForce RTX 5090est. 363 tok/stypical error 15%
- Runs on a Mac?
- MacBook Pro M5 Pro 48GBest. 107 tok/stypical error 10%
Verdicts come from the same engine that powers our fit checker: memory capacity first, bandwidth for speed. How we compute these numbers · What typical error means · Hugging Face model card
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Frequently asked questions
How much memory does Flint 40B-A2.5B need?
22.9 GB for the NVFP4 weights, plus ~0.4 GB of KV-cache at 16k context, about 23.3 GB total. Comfortable from 36 GB of VRAM or unified memory.
Does Flint 40B-A2.5B run on a Mac?
Yes, from the MacBook Pro M5 Pro 48GB (est. 107 tok/s, typical error 10%). Unified memory means the RAM budget is the only limit.
What is the smallest GPU for Flint 40B-A2.5B?
The NVIDIA GeForce RTX 5090 (32 GB VRAM) is the smallest tracked card that runs Flint 40B-A2.5B comfortably, est. 363 tok/s, typical error 15%.
Cite this page
ModelFit: Flint 40B-A2.5B, specs, memory math and hardware verdicts. https://modelfit.io/models/flint-40b/ (dataset updated 2026-10-24, CC BY 4.0).